Mold structure



June 21, 1938. 4 J. T. SENTROP 2,121,450

MOLD STRUCTURE Filed Feb. 28, 1936 3 Sheets-Sheet l INII'ENTOR. Jo%anncs 7. dkr/Tryz,

- v BY l/l/mf/ a; ML 4% w s I, 1 5 614mg: ATTORNEYS.

June 21; 193s.- E T 2,121,450

MOLD STRUCTURE Filed Feb. 28, 1936 3 Sheets-Sheet 2 Q Q Q 0 IL 11 IL i jJ I I ATTORNEYS June 21, 1938.. R 2,121,450

MOLD STRUCTURE 4 Filed Feb. 28, 1956 3 Sheets-Sheet 3 X z; INVEN TOR. Ifohannea']? 15221220 ,h Z Zfiufjor BY J77 Mal/Q5444? ATTORNEYS.

Patented June 21, 1938 MOLD STRUCTURE Johannes T. Sentrop, WyomingTownship, Kent i County, Mich.

' Application'February 28, 1936, Serial No. 66,188

p 12 Claims.

a The present inventionrelates to'mold or form structures for makingconcreteblocks and the like: and its-object is, generally, to providesuch a structure having a mold or form whose sides or wallsmay bereadily separated to remove the molded work; and more particularly toprovide such a mold having an innerwall adjustable relatively to anadjaccht outerwall of the mold; andfurther, to provide such a moldhaving sides or walls swingably connected; and further, to providesimpleand effective means for releasably securing-said walls in theirposition of use; and further, to' provide such a structure on which themold is turnable to a position wherein the Work maybe readily removed.

"These and any other and more specific objects hereinafter appearing areattained by, and

, the invention finds apreferable embodiment in,

the illustrative structure particularly described in the body of thisspecification and illustrated by the accompanying *drawings, in which:

t Figure 1 is an 'elevational righthand side view of my structure forforming concrete blocks and the like, showing the parts in theircooperative position of use;

Figure 2 isa top plan view thereof, certain parts being broken away; I IFigure-dis an elevational rear view of the same; certain parts beingbroken away; a i Figure 4 is anelevational front view of right hand sideupper portions of the structure;

Figure 5-is 'a view similar to Figure 1 but showing the rear wall of thestructure swung rearwardly and middle parts broken away;

Figure 6 is an elevational right hand side view thereof showing the formor mold portion of the structure turned forwardly, and lower portionsbroken away; l i i Figure 7 is an elevational front viewof the same,showing said form or mold portion turned forwardly, the side Walls swungopen, the inner wall swung somewhat rearwardly and the molded concreteblock and. the plate or templet withdrawn;

Figure 8 is a view in perspective of a concrete block formed in thisstructure; 7

Figure 9 is an elevational right hand side view of a modifiedconstruction, with its rear wall swung rearwardly;

Figure 10 is anelevational rear .view of upper portions thereof, certainparts being shown in vertical section taken on line ill-Ill of Figure 9;Figure 11 is a view in perspective of a concrete block formed in thismodified construction. The embodiment of the invention illustrated bythese drawings is a structure for formingor molding concrete blocks andthe like. This structure includes a support or base portion desirablycomprising a pair of metal castings I connected by horizontal threadedrods 2,3. The form or mold portion carried by, this base comprises abottom 5 pivotally mounted on the rod 3 to swing about a horizontalaxis, opposite side walls ii pivotally mounted at l on the bottom toswing about an axis at right angles to said rod, a front wall 8pivotally mounted at 9 on rod3, and a rear wall it having long arms llpivotally mounted at G on the castings I.

These walls are, desirably metal castings with strengthening ribs asshown and are releasably held in the use position shown in Figures 1, 2,3, and 4 by suitable means, as follows: A pair of Jods It at theopposite sides 6 of the mold are turnableon the spindles i l of blockswhich have spindles 65, at right angles to they spindles l4, turnable inbearings in the rear walls ears 16.

The free front ends of these rods 13 are received into notches orsockets IT in the front wall, and are threaded so that their nuts [8 maybe turned into contact with the outer side of the front wall to hold thefront and rear walls tightly in their use position. The side walls 6 arereleasably held in said use position by hook catches it engaging thefront wall 8 and similar catches 2i] engaging the hereinafter describedinnerfwall ii of the mold. The side walls are also held by the rods iswhich Wedgingly engage their upwardly-inwardly inclined ribs 5!.

The. rear wall ill carries on its inner side the core or cores 22secured thereto by threaded bolts 23 extending through the coresoutwardly projecting lugs 24 andhaving nuts 25 contacting the inner sideof the cores flanges 26. An inner Wall 21 (forming the actual rear wallof the form of mold) has its arms 3! pivotally mounted at 21 on thebottom 5 and has stops 2B threaded in the inner walls rearwardlyprojecting bosses 29, the heads 30 of these stops, when the stops areturned to desired position, engaging the inner surface of the rear wallii! to hold said rear and inner walls in desired adjusted position. Thisinner wall has curved notches 32 extending downwardly from its upperedge, in which notches the cores 22 fit at their under and lateralsides. A flat plate or templet 33 is placed in contact with the frontwalls inner surface (or its inwardly extending ribs 34 as shownl, thisplate forming the actual front wall of the mold or form.

The parts being in the use position shown" in Figures 1, 2, 3 and 4,except that the rear wall I0 is swung back to withdraw the cores,concrete is poured into the open top of the mold for forming theconcrete block 35 shown in Figure 8, whose pits 36 (for the engagementof suitable handling tools) are formed by the inward projections 31 ofthe side walls 6 and whose rabbet 38 is formed by a molding strip 39 onthe inner side of the plate 33 adjacent its lower edge as. indicated inFigures 1, 2 and 5. When the mold is filled to the level of the bottomof the notches 32 the rear wall It! with the cores is swung forwardlyand the mold is completely filled.

When the form is filled, the nuts l8 are loosened, the rods l3 swungupwardly out of the notches I! of the front wall 8 and then outwardlythe rear wall In with, the cores 22 swung rearwardly, the hook catchesI9, 20 are released and the side walls 6 are swung outwardly and theinner wall rearwardly. The form or mold portion of the structure isturned on the rod 3 upwardly and forwardly to resting position on thefront brackets 49 as shown in Figures 6 and 7. This brings the moldedblock 35 to a position wherein it rests on the now horizontal plate ortemplet 33 so that the block with. said plate may be readily removedupwardly or horizontally from the structure.

, In the modified construction illustrated in Figures 9 and 10 (whereinthe concrete block 41 shown in Figure 11 is formed), the inner wall 2 Ihas openings 42, instead of notches like those shown at 32 in otherviews, the cores 22 passing through these openings as the rear wall II]is swung. These cores are curved in cross section instead of having flatupper sides as shown in other views.

By reason of the long arms i I of the rear wall In as shown, a radius.for the swinging movement of the rear wall is provided sufficiently longthat the withdrawal of the cores does not disturb the concrete in themold.

The rabbets 45, 46 in block 41 are formed by molding stripsindicated at41, 48 in Figure 9.

The particular concrete blocks shown by the drawings are building blocksadapted to be fitted together in wall construction.

A chain 49 limits the rearwardly swinging movement of the rear wall inboth constructions, and'the coiled spring 50 whose ends are fastenedtolinks of the chain nearer each other than the length of the springserves to cushion this movement. The invention being intended to bepointed out in the claims, is not to be limited to or by details ofconstruction or arrangement of any par- .ticular embodiment thereofillustrated by the drawings or hereinbefore described.

I claim:

1. A mold structure comprising a base and a mold supported therebyhaving a. bottom, a) pair of opposite side mold walls pivotallyconnected with the bottom for swinging movement to and from operativeclosed position and a secand pair of opposite side walls one of whichbeing :a'mold wall is pivotally connected with the bottom, the other oneof said second pair being of opposite side mold walls pivotallyconnected with the bottom for swinging movement to and from operativeclosed position and a second pair of opposite side walls one of whichbeing a mold wall is pivotally connected with the bottom, the other oneof said second pair being pivotally connected with the baseindependently of the other walls for swinging movements respectively toand from operative closed position, and releasable means for holdingsaid walls in said position including a rod turnably connected with onewall of one of said pairs for vertical and horizontal swinging movementsand adapted in one swungposition to releasably engage at its free endwith the other wall of said pair to hold said pair in operatively closedposition.

3. A mold structure comprising a base and a mold supported therebyhaving a bottom, a pair of opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition and a second pair of opposite side walls one of which being amold wall is pivotally connected with the bottom, the other one of saidsecond pair being pivotally connected with the base for swingingmovements respectively to and from operative closed position, andreleasable means for holding said walls in said position including ablock member pivotally mounted on one wall of one of said pairs and arod pivotally mounted on said member to turn about an axis at rightangles to the axis of the pivotal mounting of said memberon said walland adapted to engage at its free end with the other wall of said pairto hold said pair in operative closed position.

4. A mold structure comprising a base and a mold supported therebyhaving a bottom, a pair of opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition and a second pair of opposite side walls one of which being amold wall is pivotally connected with the bottom, the

other one of said second' pair being pivotally connected with the baseindependently of the other walls for swinging movements respectively toand from operative closed position, and releasable means for holdingsaid walls in said position including a rod turnably connected with onewall of one of said pairs and having its free end threaded and providedwith a nut adapted to adjustably engage the other wall of said pair tohold said pairin operative closed position.

5. A mold structure comprising a base and a mold supported therebyhaving a bottom, a pair ofv opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition and a second pair of opposite side walls one of which being amold wall is pivotally connected with thebottom, the other one of saidsecond pair carrying the core of the mold and being pivotally connectedwith the base remote from the mold. said second pair being swingable ontheir pivotal connections to and from operative closed position.

6. A' mold structure comprising a base and a mold supported therebyhaving a bottom, a wall pivotally connected with the base for swingingmovement to and from operative closed position and an inner wallpivotally connected with thebottom for swinging movement about an axisparallel with the axis of the first-mentioned walls movement, andadjustable stops between said walls for limiting their approachingmovement.

7. A mold structure comprising abase and a mold supported thereby havinga bottom, a pair of opposite side mold walls pivotally connected withthe bottom for swinging movement to and from operative closed position,a second pair of opposite side walls one of which being a mold wall ispivotally connected with the bottom for swinging movement to and fromoperative closed position, the other one of said sec ond pair beingpivotally connected with the base for swinging movement to and fromoperative closed position, and an inner wall pivotall; connected withthe bottom for swinging movement about an axis parallel with the axis ofthe movement of the wall which is pivotally connected with the base,threaded stops for ad'- justably limiting the relatively approachingmovement of the inner wall and the wall which is connected with'thebase, releasable means for connecting the side walls in their closedposit on with the inneriwall, and releasable means for holding saidsecond pair in operative closed position.

8. A mold structure comprising a base and a mold supported therebyhaving a bottom, a pair of opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition, a second pair of opposite side walls one of which being a moldwall is pivotally connected with the bottom for swinging movement to andfrom operativeclosed position, the other one of said second paircarrying the core of the mold on its inner side and being pivotallyconnected with the base for swingingmovement to and from operativeclosed position, and an inner wall having an opening receiving said coreand being pivotally connected with the bottom for swinging movementabout an axis parallel with the axis of the movement of the wall whichis pivotally connected with the base, releasable means for holding thefirst-mentioned pair of walls in connected relation with the inner walland releasable means for holding the second-mentioned pair of walls inoperative closed position.

9. A mold structure comprising a base and a mold supported therebyhaving a bottom pivotally connected with the base for swinging movementbetween material-receiving and workdischarging positions of the mold, apair of opposite side mold wallspivotally connected with the bottom forswinging movement to and from operative closed position, a front wallpivotally connected with the bottom for swinging movement to and fromoperative position, and a rear wall pivotally connected with the baseindependently of the other walls for swinging movement to and fromoperative closed position, and releasable means for holding the walls inoperative closed position.

10. A mold structure comprising a base and a mold supported therebyhaving a bottom pivotally connected with the base for swinging movementrearwardly to a position wherein the mold receives the material to bemolded and forwardly to a position wherein the molded work is dischargedfrom the mold, a pair of opposite-side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition, a front wall pivotally connected with the bottom forrearwardly-forwardly swinging movement to and from operative closedposition, a rear wall pivotally connected with the base independently ofthe other walls for forwardly-rearwardly' swinging movement to and fromoperative closed position and an inner wall pivotally connected with thebottom for forwardly-rearwardly swinging movement to stopped positions,and releasable means for holding the walls in operative position.

11. A mold structure comprising a base and a mold supported therebyhaving a bottom pivotally connected with the base for swinging move mentrearwardly to a position wherein the mold receives the material to bemolded and forwardly to a position wherein the molded work is dischargedfrom the'mold, a pair of opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition, a front wall pivotally connected with the bottom forrearwardly-forwardly swinging movement to and'from operative closedposition, a rear wall carrying the core of the mold on its inner sideand pivotally connected with the base for forwardly-rearwardly swingingmovement to and from operative closed position and an inner wall havingan opening receiving said core and pivotally connected with the bottomfor forwardly-rearwardly swinging movement to stopped positions, andreleasable means for holding the walls in operative position.

12. A mold structure comprising a base and a mold supported therebyhaving a bottom, a pair of opposite side mold walls pivotally connectedwith the bottom for swinging movement to and from operative closedposition and a second pair of opposite side walls one of which being amold wall is pivotally connected with the bottom, the other one of saidsecond pair being pivotally connectedwith the base independently of theother walls for swinging movements respectively to and from operativeclosed positions, and releasable means for holding all the walls intheir operative closed positions including a pair of rods swingablyconnected at one end with one wall of one of said pairs and adapted toengage at their free ends the other wall of said pair and to engage intheir middles the walls respectively of the other pair of walls to holdall the walls JOHANNES T. SENTROP.

